Figure 1

FLG fabricated by interlayer catalytic exfoliation.
(a) Schematic illustration of the process from stage-1 FeCl3 intercalated graphite (FeCl3-GIC) to ICE graphene layers. (b, c) Photographs of the FeCl3-GIC powder and the highly expanded products consisting of interconnected graphene layers upon ICE. (d) Comparison images of the raw graphite (left) and the FLG (right).